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Heater for a stirling engine

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Publication number
US4894989A
US4894989A US07364556 US36455689A US4894989A US 4894989 A US4894989 A US 4894989A US 07364556 US07364556 US 07364556 US 36455689 A US36455689 A US 36455689A US 4894989 A US4894989 A US 4894989A
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US
Grant status
Grant
Patent type
Prior art keywords
heat
heater
material
storing
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07364556
Inventor
Tomokimi Mizuno
Tetsumi Watanabe
Nobuhiro Tanatsugu
Ryojiro Akiba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisin Seiki Co Ltd
Original Assignee
Aisin Seiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24JPRODUCING OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
    • F24J2/00Use of solar heat, e.g. solar heat collectors
    • F24J2/04Solar heat collectors having working fluid conveyed through collector
    • F24J2/34Solar heat collectors having working fluid conveyed through collector having heat storage mass
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02GHOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00Hot gas positive-displacement engine plants
    • F02G1/04Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053Component parts or details
    • F02G1/055Heaters or coolers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24JPRODUCING OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
    • F24J2/00Use of solar heat, e.g. solar heat collectors
    • F24J2/04Solar heat collectors having working fluid conveyed through collector
    • F24J2/06Solar heat collectors having working fluid conveyed through collector having concentrating elements
    • F24J2/07Receivers working at high temperature, e.g. for solar power plants
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02GHOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2243/00Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02GHOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2254/00Heat inputs
    • F02G2254/40Heat inputs using heat accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02GHOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2270/00Constructional features
    • F02G2270/20Plural piston swash plates
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GASES [GHG] EMISSION, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy
    • Y02E10/41Tower concentrators

Abstract

A heater for use with a Stirling engine and a method for heating a working fluid for a Stirling engine is disclosed. The heater has a burner, heater tubes disposed in the burner, a space formed around the heater tubes which is filled with heat-storing material, and a high-temperature heat source. The heat-storing material is sealed by a seal member. Heat produced by the high-temperature heat source is supplied to the heater tubes via the heat-storing material; hence the heat-storing material acts as a secondary heat source. Heat is stored in the heat-storing material in the form of sensible heat or latent heat, or a chemical reaction is employed.

Description

This application is a continuation, of application Ser. No. 07/090,512, filed Aug. 28, 1987.

FIELD OF THE INVENTION

The present invention relates to a heater which is used as a secondary heat source for heating a Stirling engine.

BACKGROUND OF THE INVENTION

A prior art technique of this kind is disclosed in Japanese Patent Laid-Open No. 93,939/1980 entitled "Heat Exchanger in External Combustion Engine." In this prior art technique, heater tubes for a Stirling engine are disposed inside the heating chamber of a heater. The space in which the heater tubes are located is filled with inert gas. The heater tubes are heated by a high-temperature heat source located outside the heating chamber via the inert gas. This technique is intended for homogeneous distribution within the heater tubes and also for protection of the tubes against heat.

This prior art technique has certain problems. For example, when the amount of heat supplied from the high-temperature heat source varies, the amount of heat supplied from the heater head of the Stirling engine and used in operating the cycle changes. This heat change varies the shaft horsepower of the engine, and, as a result, a stable output cannot be obtained.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide a heater which permits a Stirling engine to deliver output in a stable manner even if the amount of heat supplied from the high-temperature heat source varies.

The above object and others are achieved by a heater comprising a burner, heater tubes disposed in the burner, a high-temperature heat source for heating the heater tubes, and a space formed around the heater tubes and filled with heat-storing material which is sealed by a seal member and through which heat produced by the high-temperature heat source is supplied to the heater tubes. The heat-storing material acts as a secondary heat source for supplying the stored heat to the heater tubes.

The above object is also achieved by a method for heating a working fluid in a Stirling engine comprising providing a high-temperature heat source having a variable output including a low output range and a high output range, transferring heat to the working fluid from the heat source through a heat-storing material, storing heat from the heat source when said source is in the material, and maintaining the heat transfer to the working fluid at a substantially steady rate through transfer of the stored heat when the heat source is in the low output range.

When the amount of heat supplied from the primary heat source, i.e., the high-temperature heat source of the aforementioned heater, is large, heat is stored in the sealed heat-storing material. At the same time, heat is supplied to the heater tubes of the Stirling engine through the heat-storing material. When the amount of heat supplied from the high-temperature heat source is small or zero, the heat stored in the secondary heat source, i.e., the heat-storing material, is supplied to the heater tubes of the Stirling engine. Therefore, if the amount of heat supplied from the primary heat source, i.e., the high-temperature heat source, varies, the amount of heat supplied to the heater tubes and then to the cycle does not vary. This relatively constant supply of heat makes the shaft horsepower of the engine stable. In this way, the novel heater is free from the foregoing problem with the prior art technique.

BRIEF DESCRIPTION OF THE DRAWING

The single FIGURE is a cross-sectional view of a heater according to the invention, the heater being used for a Stirling engine.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to the FIGURE, a Stirling engine 10 has a heater 1 according to the invention mounted thereon. The heater 1 comprises a burner or burner housing 2, heater tubes 3 disposed in the burner housing 2, heat-storing material 5 that fills a space 4 formed around the heater tubes 3, a seal member 6 for sealing the heat-storing material 5, and a high-temperature heat source 7. The heater tubes 3 transfer a working fluid of the engine and connect expansion spaces 8 with heat accumulators 9, respectively. Heat produced by the heat source 7 is supplied to the heater tubes 3 through the heat-storing material 5. In addition, heat stored in the heat-storing material 5 can be furnished to the heater tubes 3 and, therefore, the heat-storing material 5 acts as a secondary heat source.

The heat-storing material 5 can make use of sensible heat, latent heat, or a chemical reaction to store heat. When sensible heat is employed, Na, NaK, or LiF is used. When latent heat (i.e., heat of fusion) is utilized, Li2 CO3, NaCl, or MgCl2 is used. When a chemical reaction is employed, any of the following chemical reactions can be used:

Li2 CO3 ⃡Li2 O+CO2 +53.4 Kcal/mol

SrCO3 ⃡SrO+CO2 +56.5 Kcal/mol

CaCO3 ⃡CaO+CO2 +42.6 Kcal/mol

It is also possible to combine two or more sensible heat materials, or two or more latent heat materials. Two or more chemical reaction materials can also be combined, but generally it is not feasible to combine different types of materials (e.g., a chemical reaction material with a sensible heat material or a latent heat material).

Generally, the Stirling engine is operated at a temperature of from about 700° C. to about 900° C. A sensible heat material is generally kept at subatmospheric pressures, while latent heat materials and chemical reaction materials are utilized under substantially atmospheric pressure.

In the heater 1, the heat-storing material 5 is sealed in the burner or burner housing 2. When the amount of heat supplied to the heater 1 from the high-temperature heat source 7 is large, that is the heat source has a high output, heat is stored in the inserted heat-storing material 5. When the amount of heat supplied from the high-temperature source 7 is small or zero, heat is supplied to the heater tubes 3 of the Stirling engine 10 from the heat-storing material 5 acting as a secondary heat source. Therefore, if the amount of heat supplied from the high-temperature heat source 7 varies, the quantity of heat supplied from the heater tubes 3 to the cycle will not vary. Consequently, the shaft horsepower of the engine is stable.

As described above, the use of the novel heater makes the temperature distribution uniform within the heater tubes of the heater head, and protects the tubes against excessive heat. Also, even if the amount of heat supplied from the high-temperature heat source varies, a stable shaft horsepower is obtained. Since the layer for storing heat is formed around the heater head, the changes in the temperature of the heater tubes are minute irrespective of the changes in the amount of heat applied. This eliminates the problem of thermal fatigue.

As an example, the engine is used as an engine for a generator that employs solar heat as its heat source. The engine is installed in an artificial satellite which makes one revolution around the earth in 90 minutes. In this case, when the prior art techniques are used, heating of 45 minutes alternates with non-heating of 45 minutes. In the present invention, during heating, heat is stored simultaneously with the operation of the engine and s the engine is continuously run for 90 minutes per period. Therefore, the engine can be run continuously. Hence, the novel engine generates twice as much electric power as the power generated by the existing engine of the same size. In addition, causes of troubles are avoided, because it is not necessary to repeatedly start and stop the engine.

Claims (16)

What is claimed is:
1. A heater for a Stirling engine, comprising:
a burner;
heater tubes disposed in the burner;
a primary high-temperature heat source providing a variable amount of heat for heating the heater tubes; and
a space formed around the heater tubes in the burner and filled with heat-storing material, the heat storing material being in direct contact with the heater tubes and the space being separated from said primary heat source by a seal member, heat produced by the primary heat source being supplied to the heater tubes solely through the heat-storing material, the heat-storing material acting as a secondary heat source for supplying stored heat by phase change or chemical reaction to the heater tubes, wherein the heat-storing material is substantially free of sensible heat-storing material.
2. A heater for a Stirling engine as set forth in claim 1, wherein said heat-storing material stores heat in the form of latent heat.
3. A heater for a Stirling engine as set forth in claim 2, wherein said heat-storing material comprises Li2 CO3, NaCl or MgCl2.
4. A heater for a Stirling engine as set forth in claim 1, wherein said heat-storing material stores heat by use of a chemical reaction.
5. A heater for a Stirling engine as set forth in claim 4, wherein said heat-storing material comprises Li2 CO3, SrCO3 or CaCO3.
6. A heater for a Stirling engine as set forth in claim 1, wherein said Stirling engine is operated at a temperature of from about 700° C. to about 900° C.
7. A method for heating a working fluid in a Stirling engine, comprising:
providing a high-temperature heat source having a variable output including a low output range and a high output range;
transferring heat to the working fluid from the heat source solely through a heat-storing material, the working fluid being contained in heater tubes and the heat-storing material directly contacting the heater tubes and being contained in a space surrounding the heater tubes;
storing heat from said heat source when said source is in said high output range in the heat-storing material; and
maintaining said heat transfer to said working fluid at a substantially steady rate through transfer by phase change or chemical reaction of said stored heat when said heat source is in said low output range;
wherein the heat-storing material is substantially free of sensible heat-storing material; and
wherein said heat transferring step includes transferring heat from the high-temperature heat source to the heat-storing material via a seal member separating the high temperature heat source from the space containing the heat-storing material.
8. A method for heating a Stirling engine as set forth in claim 7, wherein said heat-storing material stores heat in the form of latent heat.
9. A method for heating a Stirling engine as set forth in claim 8, wherein said heat-storing material comprises Li2 CO3, NaCl or MgCl2.
10. A method for heating a Stirling engine as set forth in claim 7, wherein said heat-storing material stores heat by use of a chemical reaction.
11. A method for heating a Stirling engine as set forth in claim 10, wherein said heat-storing material comprises Li2 CO3, SrCO3 or CaCO3.
12. A method for heating a Stirling engine as set forth in claim 11, wherein said Stirling engine is operated at a temperature of from about 700° C. to about 900° C.
13. A heater for a Stirling engine, comprising:
a burner housing;
heater tubes disposed in the burner housing;
a primary high-temperature heat source providing a variable amount of heat for supplying heat to the heater tubes in the burner housing; and
a heat-storing material directly contacting the heater tubes and contained in a space surrounding the heater tubes, said heat storing material being sealed from said heat source via a seal member disposed between the heat source and the space containing the heat-storing material, heat produced by the high-temperature heat source being supplied to the heater tubes solely through the heat-storing material, the heat-storing material acting as a secondary heat source for supplying stored heat by phase change or chemical reaction to the heater tubes;
wherein the heat-storing material is substantially free of sensible heat-storing material.
14. A heater for a Stirling engine as set forth in claim 13, wherein said heat source has a high heat output and a low heat output.
15. A heater for a Stirling engine, comprising:
a burner;
heater tubes disposed in the burner;
a primary high-temperature heat source for heating the heater tubes wherein said heat source is intermittent solar heat, and a secondary heat source for heating the heater tubes, wherein said secondary heat source is heat-storing material which directly contacts the heater tubes; and
a space formed around the heater tubes in the burner and filled with said heat-storing material, said heat-storing material being sealed from said solar heat source by a seal member, and wherein the heat produced by said solar heat source is supplied to the heater tubes by phase change or chemical reaction solely through said heat-storing material;
wherein the heat-storing material is substantially free of sensible heat-storing material.
16. An artificial satellite including a Stirling engine and a heater for said Stirling engine as claimed in claim 15.
US07364556 1986-08-29 1989-06-08 Heater for a stirling engine Expired - Fee Related US4894989A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP20432186A JPS6357856A (en) 1986-08-29 1986-08-29 Heating device for stirling engine
JP61-204321 1986-08-29

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Application Number Title Priority Date Filing Date
US9051287 Continuation 1987-08-28

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US4894989A true US4894989A (en) 1990-01-23

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Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611201A (en) * 1995-09-29 1997-03-18 Stirling Thermal Motors, Inc. Stirling engine
US5706659A (en) * 1996-01-26 1998-01-13 Stirling Thermal Motors, Inc. Modular construction stirling engine
US5722239A (en) * 1994-09-29 1998-03-03 Stirling Thermal Motors, Inc. Stirling engine
WO1998025008A1 (en) * 1996-12-03 1998-06-11 Wayne Thomas Bliesner A high efficiency dual shell stirling engine
US5771694A (en) * 1996-01-26 1998-06-30 Stirling Thermal Motors, Inc. Crosshead system for stirling engine
US5822964A (en) * 1996-12-03 1998-10-20 Kerpays, Jr.; Rudy Hot-gas engine electric heater
US5884481A (en) * 1997-07-14 1999-03-23 Stm Corporation Heat engine heater assembly
US6041598A (en) * 1997-11-15 2000-03-28 Bliesner; Wayne Thomas High efficiency dual shell stirling engine
US6263671B1 (en) 1997-11-15 2001-07-24 Wayne T Bliesner High efficiency dual shell stirling engine
WO2001092701A1 (en) * 2000-05-30 2001-12-06 Commonwealth Scientific And Industrial Research Organisation Heat engines and associated methods of producing mechanical energy and their application to vehicles
US6365822B1 (en) 2000-11-24 2002-04-02 Teledyne Energy Systems Power system having a radioisotope heat source
US6526750B2 (en) 1997-11-15 2003-03-04 Adi Thermal Power Corp. Regenerator for a heat engine
US20040168438A1 (en) * 2001-07-13 2004-09-02 Bliesner Wayne T. Dual shell stirling engine with gas backup
DE10337312B3 (en) * 2003-08-14 2005-01-05 Fachhochschule Bingen Heater for Stirling engine has pipe loops for passage of working gas embedded in ribbed body of heat-conductive material positioned adjacent biomass heat source
US20070033935A1 (en) * 2005-08-09 2007-02-15 Carroll Joseph P Thermal cycle engine with augmented thermal energy input area
WO2008116392A1 (en) * 2007-03-26 2008-10-02 Peizhou Han An intercooled constant-pressure heat-absorbing heat engine
US20080250788A1 (en) * 2007-04-13 2008-10-16 Cool Energy, Inc. Power generation and space conditioning using a thermodynamic engine driven through environmental heating and cooling
US20090038307A1 (en) * 2007-08-08 2009-02-12 Cool Energy, Inc. Direct contact thermal exchange heat engine or heat pump
US7617680B1 (en) 2006-08-28 2009-11-17 Cool Energy, Inc. Power generation using low-temperature liquids
WO2009147651A2 (en) * 2008-06-06 2009-12-10 Xelos S.R.L. A solar energy generator
US20100133820A1 (en) * 2009-08-11 2010-06-03 Jason Tsao Solar and wind energy converter
US7805934B1 (en) 2007-04-13 2010-10-05 Cool Energy, Inc. Displacer motion control within air engines
US7810330B1 (en) 2006-08-28 2010-10-12 Cool Energy, Inc. Power generation using thermal gradients maintained by phase transitions
FR2945030A1 (en) * 2009-04-29 2010-11-05 Astrium Sas Spacecraft for satellite in orbit i.e. geostationary orbit, around earth, has current generator connected to stirling engine, where current generator delivers electric power obtained in direction of logistic supports
US20110308762A1 (en) * 2010-06-22 2011-12-22 Spero Alan J High energy density thermal storage device and method
CN102705188A (en) * 2012-05-23 2012-10-03 南京航空航天大学 Solar energy-gas complementary generating device and method
CN102808704A (en) * 2012-07-12 2012-12-05 夏致俊 Charging heat-accumulating device of Stirling engine
US9140208B1 (en) * 2011-12-20 2015-09-22 David Shoffler Heat engine
WO2015165201A1 (en) * 2014-04-30 2015-11-05 郭远军 Inline-type heat energy power device and work-doing method therefor
WO2015197885A1 (en) * 2014-06-26 2015-12-30 Universidad De Sevilla Thermochemical method for the transfer and storage of concentrated solar energy

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0415389B2 (en) * 1987-12-08 1992-03-17 Kogyo Gijutsuin

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US3029596A (en) * 1959-11-17 1962-04-17 Gen Motors Corp Power plant heat storage arrangement
US3080706A (en) * 1960-02-18 1963-03-12 Gen Motors Corp Heat storage operated stirling cycle engine
US4126995A (en) * 1976-06-11 1978-11-28 U.S. Philips Corporation Hot-gas engine with protected heat reservoir
US4345645A (en) * 1980-10-20 1982-08-24 Kommanditbolaget United Stirling Ab & Co Hot gas engine heater head
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US4715183A (en) * 1987-02-27 1987-12-29 Stirling Thermal Motors, Inc. Dual source external heating system for a heat pipe

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5722239A (en) * 1994-09-29 1998-03-03 Stirling Thermal Motors, Inc. Stirling engine
US5611201A (en) * 1995-09-29 1997-03-18 Stirling Thermal Motors, Inc. Stirling engine
US5706659A (en) * 1996-01-26 1998-01-13 Stirling Thermal Motors, Inc. Modular construction stirling engine
US5771694A (en) * 1996-01-26 1998-06-30 Stirling Thermal Motors, Inc. Crosshead system for stirling engine
WO1998025008A1 (en) * 1996-12-03 1998-06-11 Wayne Thomas Bliesner A high efficiency dual shell stirling engine
US5822964A (en) * 1996-12-03 1998-10-20 Kerpays, Jr.; Rudy Hot-gas engine electric heater
US5884481A (en) * 1997-07-14 1999-03-23 Stm Corporation Heat engine heater assembly
US6526750B2 (en) 1997-11-15 2003-03-04 Adi Thermal Power Corp. Regenerator for a heat engine
US6041598A (en) * 1997-11-15 2000-03-28 Bliesner; Wayne Thomas High efficiency dual shell stirling engine
US6263671B1 (en) 1997-11-15 2001-07-24 Wayne T Bliesner High efficiency dual shell stirling engine
WO2001092701A1 (en) * 2000-05-30 2001-12-06 Commonwealth Scientific And Industrial Research Organisation Heat engines and associated methods of producing mechanical energy and their application to vehicles
US7062914B2 (en) 2000-05-30 2006-06-20 Commonwealth Scientific And Industrial Research Organization Heat engines and associated methods of producing mechanical energy and their application to vehicles
US6365822B1 (en) 2000-11-24 2002-04-02 Teledyne Energy Systems Power system having a radioisotope heat source
US20040168438A1 (en) * 2001-07-13 2004-09-02 Bliesner Wayne T. Dual shell stirling engine with gas backup
US7007469B2 (en) 2001-07-13 2006-03-07 Bliesner Wayne T Dual shell Stirling engine with gas backup
DE10337312B3 (en) * 2003-08-14 2005-01-05 Fachhochschule Bingen Heater for Stirling engine has pipe loops for passage of working gas embedded in ribbed body of heat-conductive material positioned adjacent biomass heat source
US20070033935A1 (en) * 2005-08-09 2007-02-15 Carroll Joseph P Thermal cycle engine with augmented thermal energy input area
US7607299B2 (en) * 2005-08-09 2009-10-27 Pratt & Whitney Rocketdyne, Inc. Thermal cycle engine with augmented thermal energy input area
US7617680B1 (en) 2006-08-28 2009-11-17 Cool Energy, Inc. Power generation using low-temperature liquids
US7810330B1 (en) 2006-08-28 2010-10-12 Cool Energy, Inc. Power generation using thermal gradients maintained by phase transitions
WO2008116392A1 (en) * 2007-03-26 2008-10-02 Peizhou Han An intercooled constant-pressure heat-absorbing heat engine
US7805934B1 (en) 2007-04-13 2010-10-05 Cool Energy, Inc. Displacer motion control within air engines
US8539771B2 (en) 2007-04-13 2013-09-24 Cool Energy, Inc. Power generation and space conditioning using a thermodynamic engine driven through environmental heating and cooling
US20080250788A1 (en) * 2007-04-13 2008-10-16 Cool Energy, Inc. Power generation and space conditioning using a thermodynamic engine driven through environmental heating and cooling
US7877999B2 (en) 2007-04-13 2011-02-01 Cool Energy, Inc. Power generation and space conditioning using a thermodynamic engine driven through environmental heating and cooling
US7694514B2 (en) 2007-08-08 2010-04-13 Cool Energy, Inc. Direct contact thermal exchange heat engine or heat pump
US20090038307A1 (en) * 2007-08-08 2009-02-12 Cool Energy, Inc. Direct contact thermal exchange heat engine or heat pump
WO2009147651A3 (en) * 2008-06-06 2010-11-18 Xelos S.R.L. A solar energy generator
WO2009147651A2 (en) * 2008-06-06 2009-12-10 Xelos S.R.L. A solar energy generator
FR2945030A1 (en) * 2009-04-29 2010-11-05 Astrium Sas Spacecraft for satellite in orbit i.e. geostationary orbit, around earth, has current generator connected to stirling engine, where current generator delivers electric power obtained in direction of logistic supports
US20100133820A1 (en) * 2009-08-11 2010-06-03 Jason Tsao Solar and wind energy converter
US7964981B2 (en) * 2009-08-11 2011-06-21 Jason Tsao Solar and wind energy converter
US7851935B2 (en) * 2009-08-11 2010-12-14 Jason Tsao Solar and wind energy converter
US20110308762A1 (en) * 2010-06-22 2011-12-22 Spero Alan J High energy density thermal storage device and method
US8701653B2 (en) * 2010-06-22 2014-04-22 Alan J. Spero High energy density thermal storage device and method
US9140208B1 (en) * 2011-12-20 2015-09-22 David Shoffler Heat engine
CN102705188A (en) * 2012-05-23 2012-10-03 南京航空航天大学 Solar energy-gas complementary generating device and method
CN102808704A (en) * 2012-07-12 2012-12-05 夏致俊 Charging heat-accumulating device of Stirling engine
WO2015165201A1 (en) * 2014-04-30 2015-11-05 郭远军 Inline-type heat energy power device and work-doing method therefor
ES2555329A1 (en) * 2014-06-26 2015-12-30 Universidad De Sevilla thermochemical process transfer and storage of solar energy concentrated
WO2015197885A1 (en) * 2014-06-26 2015-12-30 Universidad De Sevilla Thermochemical method for the transfer and storage of concentrated solar energy

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